Nonresounding metal vat



Jan.,l929.

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J.H.GRAVELL NONRESOUNDING METAL VAT Filed May 25, 1927 ATTORNEY PatentedJ an. l, 1929.

UNrrlazn STATES J'AIIIES H. GRAVELL, 0F ELKINS PARK, PENNSYLVANIA.

NONRESOUNDING METAL VAT.

Application led May 25,

This invention has for its object the pro-1 vision of an improved metalvat useful for various purposes such for example as acontainer forwashing machines. v

5 It is one of the primary objects of the invention to provide asubstantially soundproof or non-resounding metallic container withoutusing-an excessive quantity of material in theproduction of the same.

It is a further object to provide a relatively strong and durable metalcontainer which is .resistantV to corrosion both from the influence ofthe atmosphere or due to contact with the washing solutions to which itmay be subjected. e

The above objects are attained in the container disclosed herein withoutsacrificing'any of the desirable features of this type of ma'y chinesuch as neatness of appearance, the above and other objects appearingmore fully from the following. description when considered in connectionwith the drawings in which:

Fig. 1 is a sectional view of the members forming the containerassembled within onel another.

Fig. 2 is a similar view of the completed vat .disclosing one .form ofsealed edges.

Fig. 3 is a plan view of the devicey as shown in Fig.2.

Fig. 4 is a sectional view similar to Fig. 2 disclosing a different wayof sealing the edges of the container.

In the present embodiment of the invention the vat is formed of a seriesof seamless vatshaped members A6 and 8 nested within one another andformedwith an interlining 10 of the character described below. The outermember 6 is formed of a materialhaving a high tensile strength so as togive the requisite strength to the completed article, this member in thepresent instance being formed of sheet steel. The inner or intermediatemember 8 is formed of a material possessing relatively low tensilestrength but substantially nonoorr'osive, such for example as copper or4other like material, this member 8 being preferably of substantialthickness for producing the results described herein. The vat hereinshown is rectangular in shape although it will 'be understood that thesame may be made circular or of any other desired shape.

The body members 6 and 8 are formed of l graduated sizes as shown andare nested within one another in intimate relation throu h-` out theentire extent of the metal thereo to 19.27. Serialv No. 194,219.

form as near as practicable the equivalent of an integral one-piece vat..The two members 6 and 8 are preferably stamped together into theirfinal form from two flat sheets of the desired metal. It is accordinglyconsidered desirable to coat the contacting surfaces of the two sheetsof metal with 4a thin coating of lubricating oil to facilitate theysimultaneous stamping of the metal and to effectively close any spacebetween the metals to exclude all moisture therefrom.

Under some conditions of use it is neces sary to aperture the containeras indicated for example at 12. All of the exposed edges of the vatincluding the outer edge thereof and the edges adjacent the aperture 12are effectively sealed to prevent the admission of any substance betweenthe two container members6 and 8. The sealing of the edges thus 75cooperates with the oil lm between the members 6 and 8 to effectivelyprevent the'formation of rust therebetween.

According to the form of the invention shown in Fig. 2 the edges aresealed by rolling 80 the edges of the inner container 8 about the edges'of the outer container 6 and, if desired, additionallysealing the finaledges of the inner container where they extend over the edges of theouter container 6. In this form of the invention the outer or upper edgeof the container is formed with the rolled edge 14 and the aperturedportion of the container is bent around as indicated at 16, the twoflanges so formed, in additionto sealing ,the edges of the two containermembers, servin also to reinforce or strengthen the exposed edges of thecontainer.

VThe inner surface of the vat is covered by a nickel or, other plating10 covering all of the portion that is intended to be subjected to thewashing solutions, the plating being applied only to the inner orintermediate member 8 of the vat. i

vAccording to the form of the. invention shown in-Fig. 4 al1 of theexposed edges of L the vat-shaped members 6 and 8 are sealed by means ofan application of solder or other similar material for effectivelypreventing the seepage of any material between the t'wo containermembers. There is accordingly supplied a body of solder 14 extending.around the entire upper or outer edge of the vat and a similar body 16extending around the aperture 12.in the base of the vat. The members 6',8', and 10 are formed of -sheet steel, copper and nickel respectively,as in plating in this instance preferably extending over the solderedportions 14 and 16 in order to enhance the appearance thereof.

This second form of the invention is desii'able in that the two members6 and 8 are effectively sealedv together, the soldered edges presentinga smooth exteriorsurface free of extending parts which formsubstantially no obstruction to the use o f any desired operatingmechanism. in connection with the vat.

' It has been found that a vat or container constructed as abovedescribed is substantially dead or non-resounding thus producing thesame effect as though a vat vof much greater thickness were employed,but without the disadvantages thereof such for example as the additionalweight and material incident to a vat having a thicker Wall. It is alsofound that a vat constructed as herein set forth possesses greatstrength, considerably greater than that of the outer steel casing 6 andfurther that the vat or container is substantially rust proof since allof the surfaces exposed to the washing fluid are adequately protected byreason of the surf face plating and the material of which the innermember 8 is formed.

The provision of the non-corroslve, 1ntermediate member 8 (8) forreceiving the inner coating or member 10 (10') possesses an additionaladvantage in that any defect in the inner lining 10 (10') will notresult in a rust spot but instead will merely permit lthe contents ofthe vat to have access to the copper member 8 (8) Without any harmfuleffect. Furthermore a defect or opening in the lining 10 (10') can bereadily patched or relcoated Where this coating is Aformed upon the coer surface as herein disclosed.

aving now described my invention, what I claim and desire to secure byLetters Paten t is: a

1. A non-resounding metal vat for use with a .mechanism of the Washingmachine type comprising a number of apertured vatsha ed members ofgraduated sizes assemble' within one another in intimate contact, saidmembers being locally attached together at their rims and at the edgesof the aperture therein.

2. A non-resounding metal vat comprising a number ofvat-shaped membersof graduated sizes assembled within one another, the outer member beingformed of sheet steel, the intermediate member being of copper and theinner member being formed of nickel.

3. A non-resounding metal vat comprising a number of vat-shaped membersof graduatedsizes assembled within one another, the outer member beingformedof a`metal 'possessing relatively high tensile strength, the nextmember within said outer member being formed of a metal possessingrelatively low tensile strength and the inner member forming theinnersurface of said vat being formed of a material capable of retaininga relatively high lustre.

4. In a washing machine, a vat-'shaped member for association with themechanism of said machine and comprising a non-resounding met-al vatformed of a number of vat-shaped members of graduated sizes assembledwithin one another, the outer member being formed of a metal possessingrela- -tively high tensile strength and the next kmember within saidouter member being York and State of New York this 23rd day of May A. D.1927. y

l .TALES H. GRAVELL.

